Consider a 256K main memory system with a direct mapped cache that stores up to 4 blocks. Each Cache block comprises 4 words. The replacement style is Most Recently Used (MRU) and at the beginning the cache is empty. Compute the hitrate for the folloowing stream of addressed generated by the processor (All mem addresses are in decimal format and each address refers to a word) 170 , 257, 168, 246, 176, 175, 176, 177, 175, 176, 177, 175, 176, 177, 176, 175, 174, 173, 172, 171, 170, 169, 168, 167, 168, 165, 164